查询词典 sulfuric

The preparation conditions, such as the ration between naphthenic oil and fuming sulfuric acid, reaction time and reaction temperature, were investigated and the optimum results were obtained.

对产物用红外光谱仪进行了结构分析，并确定了反应的最佳工艺条件：环烷基油与发烟浓硫酸的体积比为5：1；最佳反应时间为4 h；最佳反应温度为40℃。

The nemeses for PP are strong oxidizers, such as the hypochlorites and higher concentrations of sulfuric, nitric, and hydrofluoric acids.

对PP具有破坏作用的是强氧化剂，如次氯酸盐，以及高浓度硫酸、硝酸和氢氟酸。

In order to recover nonferrous metals in copper-nickel alloy scrap, a corresponding technology was adopted as follows crushing copper-nickel alloy scrap→leaching the sample with sulfuric acid→extracting copper ion with N902→extracting zinc ion with P204→getting nickelous sulfate solution.

摘 要：采用粉碎白铜合金废料→酸浸出→N902萃取分离出铜离子→P204萃取分离出锌离子→水相中剩余硫酸镍溶液工艺回收白铜合金废料中的有色金属。

In order to recover nonferrous metals in copper-nickel alloy scrap, a corresponding technology was adopted as follows crushing copper-nickel alloy scrap→leaching the sample with sulfuric acid→extracting copper ion with N902→extracting zinc ion with P204→getting nickelous sulfate solution.

采用粉碎白铜合金废料→酸浸出→N902萃取分离出铜离子→P204萃取分离出锌离子→水相中剩余硫酸镍溶液工艺回收白铜合金废料中的有色金属。

Moreover, according to supply and demand at home and abroad, and market price changes, and so on, will also be on the next year, oil, o-dichlorobenzene, nitrotoluene, oriented silicon steel sheet, seamless stainless steel tubes, marine boiler gearshafts, heat-sensitive business card printing, contact image sensor, wind power equipment and other products are no longer implemented a lower rate of tax on imported tentative recovery rates, and increase the fuel oils, distillation of sulfuric acid, sulphor, autoconer, fccl copper foil products imported to the tentative tax rate.

此外，根据国内外供需状况和市场价格变化等情况，明年还将对磷酸、成品油、邻二氯苯、硝基甲苯、取向性硅电钢宽板、不锈钢制无缝锅炉管、船舶用传动轴、热敏制卡头、接触式图像传感器、风力发电设备等产品不再实施较低的进口暂定税率，恢复最惠国税率，并适当提高了燃料油、升华硫磺、硫酸、自动络筒机、覆铜板用铜箔等产品的进口暂定税率。

In pH=2.0 sulfuric acid solution, 2,2′bipyridine, an almost nonluminescent compound was transformed into a highly fluorescent compound (λex=340 nm,λem=430 nm) when attacked by ·OH generated by Fenton reaction.

在酸性介质中，Fenton反应产生的羟基自由基能将几乎无荧光的2，2′-联吡啶氧化成强荧光物质，羟基化产物的最大激发和发射波长分别是340 nm和430 nm。

Ferric sulfate and sulfuric acid was used to catalyze the conversion of palmitic acid to methyl esters.

棕榈酸制备生物柴油采用酸催化法，比较了硫酸和硫酸铁两种催化剂的效果。

Chloro-5,12-naphthacenequinone was synthesized from 2-(1-hydroxy-2-naphthyl)carbonylbenzoic acid by chlorination reaction using a mixture of phosphorus pentachloride and phosphorus oxychloride as a chlorating agent and then by ring-closing reaction using sulfuric acid as a dehydrating agent.

以2-[(1-羟基-2-萘基)羰基]苯甲酸为原料、五氯化磷/三氯氧磷为氯化剂进行氯化反应，然后用浓硫酸脱水环化，合成了6-氯-5，12-萘并萘醌，优化了反应条件，总收率达68.2%。

The test solution is prepared by dissolving 4 g of copper sulfate pentahydrate in 250ml of distilled water to which 1ml of sulfuric acid has been added.

将4g五水硫酸铜（CuSO4 5 H 2O）溶于已经加入了1ml 硫酸的250ml 的蒸馏水里。

Results: When the proportion of acetic acid and hydrogen peroxide was 2:1,the catalyst sulfuric acid used was in the range of 30～50 g/L,the reaction temperature was 25℃ and the reaction time was 24 h,the product had highest peracetic acid content.

结果，乙酸与过氧化氢质量比为2：1时，催化剂硫酸用量在30g/L~50g/L范围内，反应温度25℃和反应时间24 h综合条件下，产出过氧乙酸含量最高。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。